Last week, we have started looking into supporting a unified cgroup hierarchy (cgroupv2) in snapd. This topic shall gather information about progress and issues that come up.
So far I have been collecting notes in a gist: https://gist.github.com/bboozzoo/76b1535c93686a27bb7fdbaad0f560f7 but eventually this should all end up here.
Related:
- Snapd fails on systems without freezer cgroups (CgroupV2)
- LXD 3.15 fails with unified cgroup hierarchy
- https://bugzilla.redhat.com/show_bug.cgi?id=1438079
Intial PR by @mvo adds a warning message and attempts to degrade the functionality, rather than failing right away: https://github.com/snapcore/snapd/pull/7109
As hinted by the gist, intial work was done on Fedora 31. The branch provided here https://github.com/snapcore/snapd/pull/7193 is a collection of all changes that were required to build snapd
on Fedora 31. Thanks to @cachio a Fedora 31 image, with cgroupv2 enabled OOTB is available for spread. Spread summary when running spread manually:
2019-07-30 11:54:59 Successful tasks: 339
2019-07-30 11:54:59 Aborted tasks: 0
2019-07-30 11:54:59 Failed tasks: 16
- google:fedora-30-64-unified:tests/main/cgroup-freezer
- google:fedora-30-64-unified:tests/main/cgroup-pids
- google:fedora-30-64-unified:tests/main/document-portal-activation
- google:fedora-30-64-unified:tests/main/interfaces-calendar-service
- google:fedora-30-64-unified:tests/main/interfaces-contacts-service
- google:fedora-30-64-unified:tests/main/interfaces-packagekit-control
- google:fedora-30-64-unified:tests/main/refresh-app-awareness
- google:fedora-30-64-unified:tests/main/selinux-clean
- google:fedora-30-64-unified:tests/main/selinux-lxd
- google:fedora-30-64-unified:tests/main/snap-run
- google:fedora-30-64-unified:tests/main/stale-base-snap
- google:fedora-30-64-unified:tests/main/xdg-open
- google:fedora-30-64-unified:tests/main/xdg-settings
- google:fedora-30-64-unified:tests/regression/rhbz-1584461
- google:fedora-30-64-unified:tests/smoke/install
- google:fedora-30-64-unified:tests/upgrade/basic
2019-07-30 11:54:59 Failed task restore: 1
- google:fedora-30-64-unified:tests/main/selinux-lxd
error: unsuccessful run
Complete log is available here: https://paste.ubuntu.com/p/xWDFrYy9d9/